Pinpoint of light with astonishing speed and unbelieveble direction change.

I just went outside to smoke a cigarette and was thinking that the sky was very clear so I was checking out the beautiful winter sky when I noticed a point of light traveling from West to East. At first I thought it was a satilite, but satilites do not move this fast. The objest was covering "ground" at an amazing speed. I still did not think much of it until the object made an abrupt 90 degree turn to the North unlike anything I have ever seen and then rocketed out of sight to the North. I was totally freaked out.